In this study, a newly created Fortran program was used to assist in the constructing of a sub-bituminous coal model (SCM). Followed by grand canonical Monte Carlo simulations, the adsorption behaviors of CBM adsorption on dry-/moisture-SCM systems have been systematically studied at different pressure-temperature conditions. A geological model with typical geothermal and pressure gradients was established to investigate the effect of coupled pressure and temperature on the absorption and recovery. As a result, pure-N injection has 2 been confirmed to paly a negative role on CH recovery, whereas CO could effectively improve the CO 4 2 2 δ η sequestration and CH displacement. Meanwhile, the adsorption percentage ( ) and the recovery efficiency ( ) 4 δ were first put forward in terms of theoretical calculations. The results showed that, the was determined by pore size distribution of the SCM, adsorption temperature/pressure, moisture-containing in coal and the types of η adsorbates. The value of is 53.07% in dry coal seam, whereas 47.20% is evaluated in moisture coal seam, CH4 the corresponding optimum mining depths are 600 mand 800 m, respectively. Remarkably, water -containing in coal seam has an obviously inhibitory effect on simultaneous extraction of coal and gas, and it should be valued in the follow-up studies. Based on this principle, the optimum mining depth for CO -ECBM was predicted to be 2 ∼ 800 min actual deep coal seams through our geological model. Our results provide a molecular -scale insight into CBM recovery efficiency in coal at different burial depths, and offer useful guidance for realistic exploitation.

Liu, X., Jing, X., Ye, Y., Zhan, J., Ye, J., Zhou, S., 2020. Bacterial vesicles mediate extracellular electron transfer. Environmental Science &Technology Letters 7, 27-34.

https://doi.org/10.1021/acs.estlett.9b00707 Many Gram-negative bacteria are known to release outer membrane vesicles (OMVs) into the surrounding environment during normal growth; OMVs perform diverse biological and environmental functions (e.g., virulence factor transport, horizontal gene transfer, quorum signaling, cellular defense, and cell-to-cell Geobacter communication). However, the production of OMVs has not been reported in species, and their role Geobacter in extracellular electron transfer (EET) is unknown. Here, we demonstrate, for the first time, that sulfurreducens releases OMVs containing abundant cytochromes that can promote EET from microbial cells to Geobacter an anode. OMVs released by cells not only promote exoelectrogen EET (1.73-fold higher current Shewanella oneidensis G. density in MR-1) but also confer electrogenic ability to non-exoelectrogens ( sulfurreducens omcZ Escherichia coli mutant strain Δ and ). These functions are mainly attributed to the c abundance of -type cytochromes bound on or entrapped in OMVs. Our findings suggest that redox-active OMVs can serve as shared mediators facilitating EET in natural ecosystems, representing an ecologically important but overlooked biological electron transfer process.

Liu, X., Lai, J., Fan, X., Shu, H., Wang, G., Ma, X., Liu, M., Guan, M., Luo, Y., 2020. Insights in the pore structure, fluid mobility and oiliness in oil shales of Paleogene Funing Formation in Subei Basin, China. Marine and Petroleum Geology 114, 104228.

http://www.sciencedirect.com/science/article/pii/S0264817220300118 Pore structure is an important factor influencing reservoir properties of oil shales. Routine core analysis, thin section, scanning electron microscope (SEM), mercury injection capillary pressure (MICP) tests, Nuclear Magnetic Resonance (NMR), and computed tomography (CT) were used to provide insights into the pore throat f distribution in oil shales of member 2 of Paleogene Funing Formation (E ) in Subei Basin, China, with the 1 2 special aim to unravel the effect of pore structure on fluid mobility and oiliness. The relationships between NMR parameters, petrophysical property and capillary parameters are investigated. The results show that rock composition in the oil shales consist of quartz, feldspar, carbonate particles, clay minerals and organic matters. Pore systems consist of large-scale interparticle pores, intragranular dissolution pores, and small-scale micropores within clay minerals and the organic matter pores. Four types of pore structure (Type Ⅰ, Type Ⅱ, Type Ⅲand Type Ⅳ) are divided according to the patterns of capillary curves, capillary parameters, NMRT (transverse relaxation time) spectrum and BVI (bulk volume of 2 immovable fluid) values. From Type Ⅰ to Type Ⅳpore structure, the maximum mercury saturation (SHg ) max and mercury extrusion efficiency are decreasing, and the SHg are less than 50% averagely, indicating the oil max